A217815
Number of alternating permutations on 2n+1 letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 2, 16, 243, 5330, 148764, 4937012, 186936427, 7857183636
Offset: 0
A217816
Number of alternating permutations on 2n+1 letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 2, 16, 272, 6531, 194062, 6720714, 261538316, 11157463902
Offset: 0
A217817
Number of alternating permutations on 2n letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 5, 56, 997, 23653, 679810, 22394962, 816872290
Offset: 1
A217818
Number of alternating permutations on 2n letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 5, 56, 1004, 24310, 724379, 25125247, 978677696
Offset: 1
A217819
Number of alternating permutations on 2n letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 5, 56, 1004, 24336, 727807, 25433281, 1002714053
Offset: 1
A217820
Number of alternating permutations on 2n letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 5, 61, 1194, 30802, 953088, 33563745, 1302192441
Offset: 1
A217821
Number of alternating permutations on 2n letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 5, 61, 1194, 30945, 970717, 35033427, 1408275466
Offset: 1
A217822
Number of permutations of length 3n with descent set {3, 6, ...} that avoid a certain pattern of length 4 or 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 9, 153, 3465, 92169, 2716425
Offset: 1
A217824
Number of permutations of length 3n with descent set {3, 6, ...} that avoid a certain pattern of length 4 or 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 19, 642, 27453, 1339531, 71173264
Offset: 1
A217825
Number of permutations of length 3n with descent set {3, 6, ...} that avoid a certain pattern of length 4 or 5 (see Lewis, 2012, Appendix, for precise definition).
Original entry on oeis.org
1, 19, 642, 29777, 1673048, 106906200
Offset: 1